One is not required to — but one may be advised to — admire the smiles of certain persons.
Here are the smiles of four directors of the Dental Law Partnership, in Britain, where some citizens devote much thought and worry to the appearance of their teeth:
BONUS MATHEMATICAL EXERCISE: A web site called BestMastersInPsychology has published photographs of the “30 Most Influential Psychologists Working Today.” Look at the 30 photographs. Count how many of the influential psychologists working today are smiling, and how many are not.
BONUS TO THE BONUS: Determine how many of those 30 Most Influential Psychologists Working Today have a Nobel Prize, how many have an Ig Nobel Prize, how many are members of the Luxuriant Flowing Hair Club for Scientists, and how many are members of the Luxuriant Former Hair Club for Scientists, and how many are (or were) a boxer.